Which of the following is a tracking tool commonly used by project managers?

A Gantt chart is a widely recognized tracking tool used by project managers to visually represent the timeline of a project. It showcases the start and end dates of various tasks, allowing project managers to see overlapping activities and monitor progress against the project schedule.

The format of a Gantt chart helps in identifying which tasks need to be completed at any given point, enabling teams to manage resources effectively and ensure that deadlines are met. With this tool, project managers can easily communicate the overall project status to stakeholders, illustrating dependencies between tasks and adjusting plans as necessary.

While flow charts are useful for outlining processes and workflows, they do not serve the same purpose as Gantt charts in tracking project timelines. Email, though a vital communication medium within project management, is not specifically a tracking tool. An acuity chart is not commonly recognized in project management practices, making it less relevant in this context. Thus, the Gantt chart stands out as the most appropriate answer for tracking project progress.